// hiding.c -- variables in blocks
#include <stdio.h>
int main()
{
	int x = 30;			// original x

	printf("x in outer block: %d at %p\n", x, &x);
	{
		int x = 77;		// new x, hides first x
		printf("x in inner block: %d at %p\n", x, &x);
	}
	printf("x in outer block: %d at %p\n", x, &x);
	while (x++ < 33)	// original x
	{
		int x = 100;	// new x, hides first x
		x++;
		printf("x in while loop: %d at %p\n", x, &x);
	}
	printf("x in outer block: %d at %p\n", x, &x);

	return 0;
}